EN ISO 4885-2018 Ferrous materials - Heat treatments - Vocabulary.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Ferrous materials - Heat treatments - VocabularyBS EN ISO 4885:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4885 April 2018 ICS 01.040.25; 01.040.77; 25.200; 77.140.01 Supersedes EN ISO 4885:2017English

2、Version Ferrous materials - Heat treatments - Vocabulary (ISO 4885:2018) Matriaux ferreux - Traitements thermiques - Vocabulaire (ISO 4885:2018) Eisenwerkstoffe - Wrmebehandlung - Begriffe (ISO 4885:2018) This European Standard was approved by CEN on 2 April 2018. CEN members are bound to comply wit

3、h the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Manag

4、ement Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same sta

5、tus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malt

6、a, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Bruss

7、els 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4885:2018 ENational forewordThis British Standard is the UK implementation of EN ISO 4885:2018. It is identical to ISO 4885:2018. It supersedes BS EN ISO 4885:2017, which

8、 is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/1, Iron and steel standards co-ordinating committee.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the ne

9、cessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 51726 6ICS 77.140.01; 01.040.25; 25.200; 01.040.77Compliance with a British Standard cannot confer immunity from legal obl

10、igations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 4885:2018EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4885 April 2018

11、 ICS 01.040.25; 01.040.77; 25.200; 77.140.01 Supersedes EN ISO 4885:2017English Version Ferrous materials - Heat treatments - Vocabulary (ISO 4885:2018) Matriaux ferreux - Traitements thermiques - Vocabulaire (ISO 4885:2018) Eisenwerkstoffe - Wrmebehandlung - Begriffe (ISO 4885:2018) This European S

12、tandard was approved by CEN on 2 April 2018. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning

13、 such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its

14、 own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, German

15、y, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMI

16、TEE FR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2018 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4885:2018 EBS EN ISO 4885:2018EN ISO 4885:2018 (E) 3 European foreword This document (EN I

17、SO 4885:2018) has been prepared by Technical Committee ISO/TC 17 “Steel“ in collaboration with Technical Committee ECISS/TC 100 “General issues” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical tex

18、t or by endorsement, at the latest by October 2018, and conflicting national standards shall be withdrawn at the latest by October 2018. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identif

19、ying any or all such patent rights. This document supersedes EN ISO 4885:2017. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic

20、, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

21、Endorsement notice The text of ISO 4885:2018 has been approved by CEN as EN ISO 4885:2018 without any modification. BS EN ISO 4885:2018ISO 4885:2018(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 1Annex A (informative) Equivalent terms .31Bibliography .41 ISO 2018 All righ

22、ts reserved iiiContents PageBS EN ISO 4885:2018ISO 4885:2018(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical comm

23、ittees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

24、International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for th

25、e different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.

26、 ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this

27、 document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Tr

28、ade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 17, Steel.This third edition cancels and replaces the second edition (ISO 4885:2017), of which it constitutes

29、a minor revision with a corrected Figure 1 d).iv ISO 2018 All rights reservedBS EN ISO 4885:2018INTERNATIONAL STANDARD ISO 4885:2018(E)Ferrous materials Heat treatments Vocabulary1 ScopeThis document defines important terms used in the heat treatment of ferrous materials.NOTE The term ferrous materi

30、als include products and workpieces of steel and cast iron.Annex A provides an alphabetical list of terms defined in this document, as well as their equivalents in French, German, Chinese and Japanese.Table 1 shows the various iron-carbon (Fe-C) phases.2 Normative referencesThere are no normative re

31、ferences in this document.3 Terms and definitionsISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p s :/ www .iso .org/ obp3.1acicula

32、r structurestructure which appears in the form of needles in a micrograph3.2activityeffective concentration of species under non-ideal (e.g. concentrated) conditions; for heat treatment (3.108), this means the effective concentration of carbon or nitrogen (or both) in heat treatment media and in fer

33、rous materialsNote 1 to entry: Ratio of the vapour pressure of a gas (usually carbon or nitrogen) in a given state (e.g. in austenite (3.12) of specific carbon/nitrogen concentration) to the vapour pressure of the pure gas, as a reference state, at the same temperature.3.3ageingchange in the propert

34、ies of steels depending on time and temperature after hot working or heat treatment (3.108) or after cold-working operation, due to the migration of interstitial elementsNote 1 to entry: The ageing phenomenon can lead to higher strength and lower ductility.Note 2 to entry: The ageing effect can be a

35、ccelerated either by cold forming and/or subsequent heating (3.109) to moderate temperatures (e.g. 250 C) and soaking (e.g. for 1 h).3.4air-hardening steelDEPRECATED: self-hardening steelsteel, the hardenability (3.103) of which is such that cooling (3.45) in air produces a martensitic structure in

36、objects of considerable size ISO 2018 All rights reserved 1BS EN ISO 4885:2018ISO 4885:2018(E)3.5alpha ironstable state of pure iron at temperatures below 911 CNote 1 to entry: The crystalline structure of an alpha iron is body-centred cubic.Note 2 to entry: Alpha iron is ferromagnetic at temperatur

37、es below 768 C (the Curie point).3.6alpha mixed crystaliron with body-centred cubic lattice structure with alloying elements in interstitial or substitutional solutionNote 1 to entry: The material science for alpha mixed crystal is ferritic.Note 2 to entry: Alpha mixed crystal is ferromagnetic.3.7al

38、uminizingDEPRECATED: calorizingsurface treatment into and on a workpiece (3.201) relating to aluminium3.8annealingheat treatment (3.108) consisting of heating (3.109) and soaking (3.185) at a suitable temperature followed by cooling (3.45) under conditions such that, after return to ambient temperat

39、ure, the metal will be in a structural state closer to that of equilibriumNote 1 to entry: Since this definition is very general, it is advisable to use an expression specifying the aim of the treatment. See bright annealing (3.29), full annealing (3.89), softening/soft annealing (3.186), inter-crit

40、ical annealing (3.122), isothermal annealing (3.127) and subcritical annealing.3.9ausferritefine-grained mixture of ferrite (3.85) and stabilized austenite (3.12) which should lead to high hardness and ductility of austempered ductile cast iron (ADI)3.10ausformingthermomechanical treatment (3.208) o

41、f a workpiece which consists of plastically deforming the metastable austenite (3.12) before subjecting it to the martensitic and/or bainitic transformation3.11austemperingisothermal heat treatment for producing bainitic (see 3.17 and 3.18) or ausferritic (see 3.9) structure of a workpieceNote 1 to

42、entry: The final cooling (3.45) to ambient temperature is not at a specific rate.3.12austenitesolid solution of one or more elements in gamma iron (3.91)Note 1 to entry: See also Table 1.3.13austenitic steelsteel where the structure consists of austenite (3.12) at ambient temperatureNote 1 to entry:

43、 Cast austenitic steels can contain up to about 20 % of ferrite (3.85).2 ISO 2018 All rights reservedBS EN ISO 4885:2018ISO 4885:2018(E)3.14austenitizingheating (3.109) a workpiece to austenitizing temperature (3.15) and holding at this, so that the microstructure is predominantly austenitic (3.12)N

44、ote 1 to entry: The minimum temperature required depends on the speed of heating and the steel composition. The length of the hold period will depend on the heating conditions used.3.15austenitizing temperaturetemperature at which the workpiece is maintained during austenitization (3.14)3.16auto-tem

45、peringself-temperingtempering (3.203) undergone by martensite (3.137) during quenching (3.168) or subsequent cooling (3.45)3.17bainitemicrostructure resulting from the transformation of austenite (3.12) at temperatures above martensite (3.137) start temperature (Ms) and outside the pearlite (3.155)

46、range consisting of ferrite laths and carbides which are dispersed either inside the ferrite laths (lower bainite) or between the ferrite laths (upper bainite)Note 1 to entry: See also Table 1.3.18bainitizingaustenitizing (3.14) and quenching (3.168) to a temperature above Msand isothermal soaking t

47、o ensure a transformation of the austenite (3.12) to bainite (3.17)3.19bake hardening steelsteel with the ability to gain an increase of yield strength after a plastic pre-strain and a subsequent heat treatment (3.108) in the usual industrial paint processes (in the region of 170 C for 20 min)Note 1

48、 to entry: These steels have a good suitability for cold forming and present a high resistance to plastic straining (which is increased on finished parts during heat treatment) and a good dent resistance.3.20bakingheat treatment (3.108) permitting the release of hydrogen absorbed in a ferrous produc

49、t without modifying its structureNote 1 to entry: The treatment is generally carried out following electrolytic plating or pickling, or a welding operation.3.21banded structurelines of constituents in the microstructure caused by segregation (3.179) during solidification3.22blackingoperation carried out in an oxidizing medium at a temperature such that the polished surface of a workpiece becomes covered with a thin, continuous, adherent film of dark-coloured oxide (see 3.151)3.23black nitridingnitriding (3.143) followed by oxidation (3.150) of